Overview

Seborrheic dermatitis (say "seh-buh-REE-ick der-muh-TY-tus") is a rash with greasy, flaky skin patches. The patches can look whitish. With lighter skin, the skin under the patches can look reddish. With darker skin, the skin can also look darker or lighter than the usual skin colour.

The rash may appear on many parts of the body. It may be on the scalp, face (especially the eyebrow area and near the nose and mouth), ears, underarms, or genital area or under the breasts. The flaky skin on the scalp is called dandruff.

This rash is often a long-term (chronic) condition, with symptoms that come and go. It may get worse with cold, dry weather or stress. Treatments include antifungal shampoos and medicines that are put on the skin.

What causes this isn't fully understood. It may involve the oil glands in skin. A type of skin fungus, or yeast, may also be linked with this condition.

How can you care for yourself at home?

• If your doctor prescribes a steroid cream, dandruff shampoo, or antifungal cream or medicine, use it as directed. If your doctor prescribes other medicine, take it as directed.
• Use a dandruff shampoo if seborrheic dermatitis affects your scalp. You may need to try a few kinds of shampoo to find the one that works best for you.